Comparison

C vs GenR8

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

C

This app analyzes photographs to display the color of any point in XYZ and L*a*b* color spaces. It also allows for measuring the distance between two colors within the L*a*b* color space. Calibration options are available for matching camera characteristics and photography environments.

Highlights
  • Color measurement in XYZ and L*a*b*
  • Distance measurement between colors
  • Camera characteristic adjustment
  • Photography environment calibration
  • Color checker calibration
Features
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C-MEASURE is application to measure a simple color. It display the color of an arbitrary place of the photograph in XYZ, L*a*b*. In addition, It can measure distance on the L*a*b* color space of two colors. The conversion parameter to the chromaticity value performs the adjustment that It matched with the characteristic of the camera of iPhone4 from photograph data, but the calibration that It accept photography environment, and used the color checkers is possible.

About

GenR8

Generate professional test patterns for display calibration and validation. Supports external displays via HDMI, DisplayPort, or AirPlay, with HDR pattern support and precision controls for accurate results. Export patterns in various formats.

Highlights
  • 28+ Professional Test Patterns
  • External Display Support (HDMI, DisplayPort, AirPlay)
  • HDR Pattern Support
  • Audio Test Tones & Live Metering
  • Precision Controls & Customizable Overlays
  • Export Test Patterns
Features
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KEY FEATURES: * 28+ Professional Test Patterns - SMPTE color bars, calibration grids, convergence patterns, HDR test signals, luma stepping, IRE patterns, and more * External Display Support - Connect via USB-C to HDMI/DisplayPort or AirPlay. Full 1:1 pixel mapping for accurate calibration * AV Sync Test * Audio Test Tones - Sine, square, sawtooth, and white noise waveforms from 20Hz to 20kHz with live stereo metering * HDR Pattern Support - PQ curve test patterns, HDR color bars, and BT.2111 UHD patterns for HDR display validation * Precision Controls - Customizable aspect ratio overlays, diagnostic crosshairs, border guides, and adjustable scanning color bars * Live Audio Metering - Real-time L/R level meters with peak detection for audio signal monitoring * iPad Optimized - Split-view interface with pattern library sidebar and full-screen preview * Customizable Overlays - Display resolution info, clock, date, custom text, and diagnostic guides * Export Test Patterns in PNG, PDF, JPG, TIFF PERFECT FOR: - Video engineers calibrating displays - AV technicians testing signal chains - Filmmakers validating monitor accuracy - Content creators ensuring color fidelity - Anyone needing professional test patterns on the go DISPLAYS SUPPORTED: *External monitors, projectors, TVs, and broadcast displays via HDMI, DisplayPort, or AirPlay. Made with precision for professionals who demand accuracy.

Screenshots

C4 screens
GenR84 screens

Verdict

The call

The clearest difference is review sentiment: GenR8 at 100% against C's 0%. GenR8 also leads on rating (4.9 vs 1.0) and update cadence (every 10 days vs every 14 months). C's advantage is price ($2.99 vs $19.99) and iOS requirement (13.0 vs 17.0). On ads, in-app purchases, monetization model and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

C costs $2.99 and GenR8 $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

GenR8 holds the better App Store score, 4.9 against 1.0. That said, the two scores are not equally well evidenced: GenR8 has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of C's written reviews are positive against 100% of GenR8's.

UpkeepUpdate frequency

C ships an update every 14 months, GenR8 every 10 days. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

Scorecard6 real differences · 4 level
C versus GenR8: the parameters behind the verdict, then further details
ParameterCGenR8
Price$2.99 — better$19.99
Rating1.0 (1 ratings)4.9 (9 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings19 — better
Update frequencyEvery 14 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size4 MB21 MB
Age rating4+4+
Developeralpha prompt co.,ltd.Christopher Van Hoose

Customer experience

C

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

GenR8

All ratings9 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

C

No in-app purchases

None

GenR8

No in-app purchases

Questions

Is C free?
C costs $2.99, with no in-app purchases.
Is GenR8 free?
GenR8 costs $19.99, with no in-app purchases.
Which has better reviews, C or GenR8?
GenR8 is rated higher. C averages 1.0 out of 5 from 1 ratings, while GenR8 averages 4.9 from 9 ratings.
Do C or GenR8 have ads?
Neither C nor GenR8 shows ads.
Which is updated more often, C or GenR8?
C ships an update every 14 months, and GenR8 every 10 days. Most recently, C was updated on November 1, 2026 and GenR8 on October 30, 2026.

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